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The combo pack includes On the Rain Slick Precipice of Darkness, Episode One and Two. These are episodic RPG games based on the webcomic Penny Arcade.
Episode One has a 77 metascore while Episode Two has an 80 metascore.
http://www.metacritic.com/game/pc/penny-arcade-adventures-on-the-rain-slick-precipice-of-darkness
http://www.metacritic.com/game/pc/penny-arcade-adventures-on-the-rain-slick-precipice-of-darkness-episode-two
This game is also available for Mac.